A top drive well drilling apparatus

Details A top drive well drilling apparatus A top drive well drilling apparatus

E - Fixed Constructions

21

B

E21B 3/02 (2006.01) E21B 4/00 (2006.01) E21B 15/00 (2006.01) E21B 19/16 (2006.01)

Patent

CA 2390365

A top drive well drilling apparatus includes a body with means for suspending the body from a drilling rig. A motor is secured to the body. The motor has a central passage defining a rotational axis. The central passage is adapted to receive a tubular drive shaft. A pipe gripping assembly is provided which underlies and is in axial alignment with the central passage. The pipe gripping assembly rotates independent of the motor for purposes of orientation.

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